沿岸沉积物中~(210)Pb的分离和测定的研究

正> 近十多年来的研究表明,~(210)Pb作为沉积过程的年代学时钟,已成功地用于沿岸、湖泊沉积速率和沉积层年龄的测定.它的测年适用范围大约为100年左右,因此~(210)Pb方法是研究沿岸海域近百年的污染历史以及进行海洋地球化学研究的非常有用的工具.要进行~(210)Pb的地质年代学研究,首先必须把极微量的~(210)Pb从沉积物的复杂体系中分离出来,并进行纯化和测定.~(210)Pb不但要与大量的常量元素(如Fe)分离,而且要与其他放射性核素(如铀、钍系成员及人工放射性核素)进行分离,要达到一定的放化纯度

THE SEPARATION AND DETERMINATION OF ~(210)Pb IN THE COASTAL MARINE SEDIMENTS

正> A procedure for the separation and determination of ~(210)Pb in the coastal marine sediments is presented, in which a modified anion-exchange process is used for separating andpurifying of ~(210)Pb. The stable Pb carrier was added along with enough 6M HC1 to 5—10g of ignited sediment. The mixture was heated and leached for two hours. After centrifu

Electrochemical Applications of Single-walled Carbon Nanohorns

单壁碳纳米角具有独特的性质，如大的比表面积、良好的导电性和生物相容性等，在某些领域应用广泛. 本文结合作者课题组工作，综述了单壁碳纳米角电化学应用现状，并展望其今后的发展趋势.Single-wall carbon nanohorns (SWCNHs) have unique properties, such as a large specific surface area, good electrical conductivity and biocompatibility. It has been widely utilized in many fields. In the present review, the progress in electrochemistry study of SWCNHs has been summarized and the future research trends have been proposed.国家自然科学基金项目（No. 21274022，No. 21175126）资助作者联系地址：1. 福建师范大学化学与化工学院，福建 福州 350007； 2. 福建师范大学化工新材料研究所，福建 福州 350007； 3. 福建师范大学材料科学与工程学院，福建 福州 350007； 4. 长春应用化学研究所电分析化学国家重点实验室，吉林 长春 130022Author's Address: 1. College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou 350007, China; 2. Institute of New Chemical Materials, Fujian Normal University, Fuzhou 350007, China; 3. College of Materials Science and Engineering, Fujian Normal University, Fuzhou 350007, China; 4. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China通讯作者E-mail：[email protected]; [email protected]